omap_hsmmc: Allow for power saving without going off
An eMMC may be always powered on, so that the lowest
power saving state possible is sleeping. Add a field
to the platform data to indicate that.
Signed-off-by: Adrian Hunter <adrian.hunter@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
diff --git a/arch/arm/mach-omap2/hsmmc.c b/arch/arm/mach-omap2/hsmmc.c
index 4a05c37..e4ab123 100644
--- a/arch/arm/mach-omap2/hsmmc.c
+++ b/arch/arm/mach-omap2/hsmmc.c
@@ -202,6 +202,9 @@
if (c->power_saving)
mmc->slots[0].power_saving = 1;
+ if (c->no_off)
+ mmc->slots[0].no_off = 1;
+
/* NOTE: MMC slots should have a Vcc regulator set up.
* This may be from a TWL4030-family chip, another
* controllable regulator, or a fixed supply.
diff --git a/arch/arm/mach-omap2/hsmmc.h b/arch/arm/mach-omap2/hsmmc.h
index f641f59..2453a7a 100644
--- a/arch/arm/mach-omap2/hsmmc.h
+++ b/arch/arm/mach-omap2/hsmmc.h
@@ -14,6 +14,7 @@
bool cover_only; /* No card detect - just cover switch */
bool nonremovable; /* Nonremovable e.g. eMMC */
bool power_saving; /* Try to sleep or power off when possible */
+ bool no_off; /* power_saving and power is not to go off */
int gpio_cd; /* or -EINVAL */
int gpio_wp; /* or -EINVAL */
char *name; /* or NULL for default */
diff --git a/arch/arm/plat-omap/include/plat/mmc.h b/arch/arm/plat-omap/include/plat/mmc.h
index 8b23d32..b463949 100644
--- a/arch/arm/plat-omap/include/plat/mmc.h
+++ b/arch/arm/plat-omap/include/plat/mmc.h
@@ -96,6 +96,9 @@
/* Try to sleep or power off when possible */
unsigned power_saving:1;
+ /* If using power_saving and the MMC power is not to go off */
+ unsigned no_off:1;
+
int switch_pin; /* gpio (card detect) */
int gpio_wp; /* gpio (write protect) */
diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c
index 2c5e15d..e15d0f4 100644
--- a/drivers/mmc/host/omap_hsmmc.c
+++ b/drivers/mmc/host/omap_hsmmc.c
@@ -1656,6 +1656,9 @@
dev_dbg(mmc_dev(host->mmc), "DISABLED -> %s\n",
host->dpm_state == CARDSLEEP ? "CARDSLEEP" : "REGSLEEP");
+ if (mmc_slot(host).no_off)
+ return 0;
+
if ((host->mmc->caps & MMC_CAP_NONREMOVABLE) ||
mmc_slot(host).card_detect ||
(mmc_slot(host).get_cover_state &&
@@ -1671,6 +1674,9 @@
if (!mmc_try_claim_host(host->mmc))
return 0;
+ if (mmc_slot(host).no_off)
+ return 0;
+
if (!((host->mmc->caps & MMC_CAP_NONREMOVABLE) ||
mmc_slot(host).card_detect ||
(mmc_slot(host).get_cover_state &&